Flexible magnetic disc, positioning apparatus and method permitt

Details Flexible magnetic disc, positioning apparatus and method permitt Flexible magnetic disc, positioning apparatus and method permitt

1984-05-22

1987-02-24

Wolff, John H.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

360 97, 360133, 360105, 360135, 428336, 428415, G11B 5016, G11B 5012, G11B 2303, G11B 554

Patent

active

046461795

ABSTRACT:
A flexible magnetic disc for use in combination with a magnetic head assembly which includes a regulator plate and performs magnetic recording or playback by protruding a magnetic head beyond a predetermined support level of a rotatable sheet of magnetic recording medium at least by an amount which is substantially equal to a total thickness of the recording medium. Assuming that the recording medium has a total thickness of t millimeters (mm) and a Young's modulus of E grams per square millimeter (g/mm.sup.2), a product of the Youngs's modulus E and the third power of the total thickness t, i.e. Et.sup.3, lies in a range between a lower limit of 2.5 g.mm and an upper limit of 36 g.mm inclusive of the lower and upper limits.

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IBM Technical Disclosure Bulletin vol. 18, No. 3, Aug. 75, pp. 895-896, "Magnetic Disk Recor. and Transd. Gaps Disposed End-to-End" by A. J. Bowen.
IBM Technical Disclosure Bulletin vol. 6, No. 9, Feb. 64, pp. 57-58 "Pressure Pad for Mag. Heads" by M. f. Bord.

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